Cleaning device

Abstract

The utility model discloses a cleaning device, which belongs to the technical field of household appliances and comprises a machine body provided with a mounting cavity, a driving device and a dust suction port, a rolling brush is arranged in the mounting cavity and comprises a driving end and a follow-up end, the dust suction port is arranged on the wall of the mounting cavity, and a gap is reserved between the peripheral surface of the rolling brush and the wall of the mounting cavity. The installation cavity comprises a flow guide section extending from the driving end to the position close to the dust collection opening and a dust removal section extending from the end of the flow guide section to the follow-up end, the dust collection opening corresponds to the dust removal section, and the width, corresponding to the flow guide section and the dust removal section, of the gap is increased from the side of the driving end to the side of the follow-up end. The width change rate of the gap corresponding to the dust removal section is greater than that of the gap corresponding to the flow guide section. And the dust suction port is communicated with the part with the larger width of the gap, so that dirt entering the dust removal section from the flow guide section under the driving of the rolling brush can be smoothly sucked away through the dust suction port, the dirt is prevented from being stuck in the dust removal section, and the dust suction effect is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a cleaning device. Background Art

[0002] As a kind of intelligent household cleaning appliance, cleaning robots play an increasingly important role in people's daily lives. Existing cleaning robots are generally provided with a roller brush and a dust suction module. The roller brush is arranged in the installation cavity and the bottom side contacts the surface to be cleaned. A dust suction port is arranged on the cavity wall of the installation cavity. The dust suction module has a dust box and a fan. The inlet of the dust box is connected to the dust suction port. When the fan is working, it provides suction to form a dust suction airflow that flows from the dust suction port into the dust box. When the cleaning robot is working, the rotating roller brush cleans the surface to be cleaned. The dirt brought up by the roller brush is sucked into the dust box through the dust suction port under the suction of the dust suction airflow, thereby achieving the purpose of dust suction. The dust suction port of the existing cleaning robot is generally arranged in the center of the installation cavity. Since the two ends of the roller brush are far away from the dust suction port, the suction force of the dust suction airflow at the two ends of the roller brush is weak. It is difficult for the dirt at the two ends of the roller brush to flow smoothly toward the dust suction port following the dust suction airflow. This results in an unsatisfactory dust suction effect, which is not conducive to improving the user experience. Utility Model Content

[0003] In order to solve the shortcomings and deficiencies existing in the above-mentioned prior art, the utility model provides a cleaning device, in which a dust suction port is connected to a portion with a larger gap width, so that the dirt entering the dust removal section from the guide section under the drive of the roller brush can be smoothly sucked away through the dust suction port, thereby avoiding the dirt from being stuck in the dust removal section and ensuring the dust suction effect.

[0004] In order to achieve the above technical objectives, the utility model provides a cleaning device, including a body provided with an installation cavity, a driving device and a dust suction port, a roller brush driven by the driving device is provided in the installation cavity, the roller brush includes a driving end connected to a motor and a following end away from the motor, the dust suction port is provided on the cavity wall of the installation cavity, a gap for dirt to flow is provided between the outer peripheral surface of the roller brush and the cavity wall of the installation cavity, the installation cavity includes a guide section extending from the driving end to near the dust suction port and a dust removal section extending from the end of the guide section to the following end, the dust suction port is provided corresponding to the dust removal section, the width of the gap corresponding to the guide section and the dust removal section both increases from one side of the driving end to the side of the following end, and the width change rate of the gap corresponding to the dust removal section is greater than the width change rate of the gap corresponding to the guide section.

[0005] Preferably, the roller brush is conical and its outer diameter decreases from the driving end to the following end.

[0006] Preferably, the roller brush comprises a first part corresponding to the guide section and a second part corresponding to the dust removal section, and the taper of the second part is greater than the taper of the first part.

[0007] Preferably, the guide section and the dust removal section of the installation cavity are both in the shape of a conical cavity, the inner diameter of the guide section gradually decreases from the driving end to the dust suction port, and the inner diameter of the dust removal section gradually increases from the dust suction port to the following end.

[0008] Preferably, the inner diameters of the installation cavity in the guide section and the dust removal section are consistent.

[0009] Preferably, a scraping body is provided on the outer peripheral surface of the roller brush, which spirally extends from the driving end to the following end along the rotation direction of the roller brush.

[0010] Preferably, the pitch of the scraping body gradually increases from the driving end to the following end.

[0011] Preferably, a cutting piece for cutting hair is provided in the mounting cavity corresponding to the follower end.

[0012] Preferably, the length ratio of the guide section to the dust removal section is 6:1 to 2:1.

[0013] Preferably, the machine body is provided with two running wheels spaced apart on the left and right, and the rotation direction of the roller brush is consistent with the rotation direction of the running wheels.

[0014] After adopting the above technical solution, the utility model has the following advantages:

[0015] 1. The cleaning device provided by the utility model is provided with a guide section and a dust removal section in the installation cavity, the guide section extends from the driving end to the side close to the dust suction port, the dust removal section extends from the end of the guide section to the follower end, and a gap is provided between the outer peripheral surface of the roller brush and the cavity wall of the installation cavity, the width of the gap corresponding to the guide section and the dust removal section increases from one side of the driving end to the side of the follower end, and the width change rate of the gap corresponding to the dust removal section is greater than the width change rate of the gap corresponding to the guide section, that is, the width of the gap adopts a nonlinear increasing trend from the driving end to the follower end, and the width of the gap in the dust removal section is further increased, and the dust suction port is provided corresponding to the dust removal section, so that the dust suction port is connected to the part with a larger gap width, so that the dirt entering the dust removal section from the guide section under the drive of the roller brush can be smoothly sucked away through the dust suction port, avoiding the dirt from being stuck in the dust removal section, and ensuring the dust suction effect. In addition, since the gap corresponds to the width of the guide section gradually increasing from the driving end to the dust suction port, the cross-sectional area of ​​the gap between the driving end of the roller brush and the cavity wall of the guide section is relatively small, and since the strength of the dust suction airflow is inversely proportional to the cross-sectional area of ​​the flow, the suction strength of the dust suction airflow at the driving end can be appropriately increased. The gap corresponds to the width of the guide section gradually increasing from the driving end to the dust suction port, and the resistance to the movement of dirt from the driving end to the dust suction port can also be reduced, so that the dirt at the driving end can flow smoothly toward the dust suction port along the guide section under the suction of the dust suction airflow, thereby ensuring the dust suction effect and improving the user experience.

[0016] 2. The roller brush is preferably conical, and the outer diameter of the roller brush decreases from the driving end to the follower end. The outer diameter difference between the two ends of the roller brush axial direction is used to provide a certain width change space for the gap, so that the width of the gap can maintain a nonlinear increasing trend from the driving end to the follower end without increasing the maximum ground width of the installation cavity. In addition, since the overall rotation speed of the roller brush is consistent, the linear speed of the roller brush at the driving end is greater than the linear speed at the follower end. The dirt driven by the roller brush is easy to move from the driving end with a larger linear speed to the follower end with a smaller linear speed, which is conducive to ensuring the dust collection effect.

[0017] 3. The roller brush includes a first part and a second part, the first part corresponds to the guide section, and the second part corresponds to the dust removal section. The taper of the second part is greater than that of the first part, that is, the outer diameter of the roller brush adopts a nonlinear decreasing trend. The outer diameter of the roller brush in the second part can be further reduced, and the width of the gap between the outer peripheral surface of the second part and the cavity wall of the dust removal section is further increased, so that the dirt moving from the first part to the second part can be more easily separated from the roller brush and sucked away through the dust suction port, which is beneficial to improve the dust suction effect.

[0018] 4. In one of the schemes, the guide section and the dust removal section of the installation cavity are both in a conical cavity state, the inner diameter of the guide section gradually decreases from the driving end to the dust suction port, and the inner diameter of the dust removal section gradually increases from the dust suction port to the following end. The inner diameter of the installation cavity shows a nonlinear change trend of first decreasing and then increasing. The specific structure of the installation cavity is reasonably set so that the combination of the change in the inner diameter of the installation cavity and the change in the outer diameter of the roller brush can be used to form a gap with a nonlinearly increasing width.

[0019] 5. In another solution, the inner diameters of the installation cavity in the guide section and the dust removal section are consistent. In this case, only the change in the outer diameter of the roller brush can be used to form a gap with a nonlinearly increasing width.

[0020] 6. A scraper body is arranged on the outer circumference of the roller brush. The scraper body extends spirally from the driving end to the follower end along the rotation direction of the roller brush. When the roller brush rotates, the scraper body guides the dirt. The dirt can move from the driving end to the follower end under the guidance of the scraper body. The dirt moving to the follower end can be smoothly sucked away through the dust suction port. The specific structure of the roller brush is reasonably set to improve the collection effect of dirt.

[0021] 7. The pitch of the scraper body preferably increases gradually from the driving end to the following end, that is, the scraper body preferably adopts a non-uniform pitch structure, and the inclination of the scraper body relative to the axial direction of the roller brush gradually slows down from the driving end to the following end. The axial component of the scraper body on the dirt gradually decreases from the driving end to the following end. The axial component of the scraper body on the dirt can be used to strengthen the suction force of the dust suction airflow on the dirt at the driving end, so that the dirt at the driving end can move smoothly toward the dust suction port under the joint action of the dust suction airflow and the scraper body.

[0022] 8. A cutting piece is arranged in the installation cavity corresponding to the follower end, and the cutting piece is used to cut off the hair entangled on the follower end. The cut hair can be smoothly sucked away through the suction port, so as to avoid the hair flowing toward the follower end along with the suction airflow from being entangled on the follower end, causing the roller brush to be stuck or even the driving device to shut down due to excessive load.

[0023] 9. Reasonably set the length ratio of the guide section and the dust removal section so that the dirt can flow smoothly from the dust removal section to the dust suction port after flowing through the guide section. If the ratio of the two is greater than 6:1, the guide section is too long, the suction force of the dust suction airflow at the driving end is weak, and the dirt at the driving end cannot follow the dust suction airflow to flow smoothly toward the dust removal section. The distance that the dirt moves from the guide section to the dust removal section is too long, which is not conducive to ensuring the dust suction effect. If the ratio of the two is less than 2:1, the dust removal section is too long, and the suction force of the dust suction airflow at the following end is weak, which is not conducive to ensuring the dust suction effect.

[0024] 10. The rotating roller brush contacts the surface to be cleaned and is subjected to friction when cleaning the surface. The rotating walking wheel makes the cleaning device contact the surface to be cleaned and is subjected to friction when moving. The rotation direction of the roller brush is preferably set to be consistent with the rotation direction of the walking wheel. The directions of the two friction forces are consistent. The friction force of the roller brush is used to assist the walking wheel in driving the cleaning device to move forward, which can improve the moving smoothness of the cleaning device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a cross-sectional view of the cleaning device of Example 1 along the front-to-back direction;

[0026] Figure 2 It is a schematic top view of a partial structure of a cleaning device in Example 1;

[0027] Figure 3 It is a bottom view schematic diagram of a partial structure of a cleaning device in Example 1;

[0028] Figure 4 It is a structural diagram of a roller brush in a cleaning device of Example 1;

[0029] Figure 5 is a cross-sectional view of the cleaning device of Example 1 along the left-right direction;

[0030] Figure 6 It is a structural diagram of the roller brush in the cleaning device of the second embodiment;

[0031] Figure 7 It is a schematic diagram of the cooperation between the roller brush and the installation cavity in the cleaning device of the second embodiment;

[0032] Figure 8 This is a schematic diagram of the cooperation between the roller brush and the mounting cavity in the cleaning device of Example 3;

[0033] Fig. 9 This is a structural diagram of the roller brush in the cleaning device of Example 4.

[0034] In the figure, 100-machine body, 110-installation cavity, 111-flow guide section, 112-dust removal section, 120-dust suction port,

[0035] 200-Drive device,

[0036] 300-roller brush, 300a-first part, 300b-second part, 310-driving end, 320-following end, 330-shaft section, 340-scraping body, 341-scraping rubber strip, 342-scraping hair bundle,

[0037] 400-gap, 410-first end, 420-second section,

[0038] 510-Universal wheel, 520-Travel wheel,

[0039] 600-dust collection module, 610-dust box, 620-fan,

[0040] 700-cut pieces. DETAILED DESCRIPTION

[0041] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following words indicating orientation or positional relationship such as "upper", "lower", "left", "right", "longitudinal", "lateral", "inner", "outer", "vertical", "horizontal", "top", "bottom", etc. are only based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0042] Embodiment 1

[0043] Combination Figures 1 to 5A cleaning device provided in Embodiment 1 of the present invention includes a body 100 provided with an installation cavity 110, a driving device 200 and a dust suction port 120. A roller brush 300 driven by the driving device 200 is provided in the installation cavity 110. The roller brush 300 includes a driving end 310 connected to a motor and a follower end 320 away from the motor. The dust suction port 120 is provided on the cavity wall of the installation cavity 110. There is a gap 400 for dirt to flow between the outer peripheral surface of the roller brush 300 and the cavity wall of the installation cavity 110. The installation cavity 110 includes a guide section 111 extending from the driving end 310 to the dust suction port 120 and a dust removal section 112 extending from the end of the guide section 111 to the follower end 320. The dust suction port 120 is arranged corresponding to the dust removal section 112. The width of the gap 400 corresponding to the guide section 111 and the dust removal section 112 gradually increases from one side of the driving end 310 to the side of the follower end 320, and the width change rate RC2 of the gap 400 corresponding to the dust removal section 112 is greater than the width change rate RC1 of the gap 400 corresponding to the guide section 111.

[0044] The width of the gap 400 increases in a nonlinear manner from the driving end 310 to the following end 320, and the width of the gap 400 further increases in the dust removal section 112. The dust suction port 120 is arranged corresponding to the dust removal section 112, so that the dust suction port 120 is connected to the wider portion of the gap 400, so that the dirt entering the dust removal section 112 from the guide section 111 driven by the roller brush 300 can be smoothly sucked away through the dust suction port 120, thereby avoiding the dirt from being stuck in the dust removal section 112 and ensuring the dust suction effect. Since the gap 400 corresponds to the width of the guide section 111 which gradually increases from the driving end 310 to the dust suction port 120, the cross-sectional area of ​​the gap 400 between the driving end 310 of the roller brush 300 and the cavity wall of the guide section 111 is relatively small, and since the strength of the dust suction airflow is inversely proportional to the cross-sectional area of ​​the flow, the suction strength of the dust suction airflow at the driving end 310 can be appropriately increased. The gap 400 corresponds to the width of the guide section 111 which gradually increases from the driving end 310 to the dust suction port 120 and can also reduce the resistance to the movement of dirt from the driving end 310 to the dust suction port 120, so that the dirt at the driving end 310 can flow smoothly toward the dust suction port 120 along the guide section 111 under the suction of the dust suction airflow, thereby ensuring the dust suction effect and improving the user experience.

[0045] Combination Figure 1 , Figure 2 , Figure 3, this embodiment is described by taking a cleaning robot as an example. A universal wheel 510 and a running wheel 520 are provided at the bottom of the body 100. A running motor for driving the running wheel 520 is provided inside the body 100. The running motor can control the running wheel 520 to move forward or backward according to a pre-written program, so that the running wheel 520 drives the body 100 to move forward or backward. In this embodiment, the mounting cavity 110 is roughly arranged in the middle area of ​​the body 100 in the front-to-back direction. The mounting cavity 110 extends in the left-right direction and is open at the bottom. The roller brush 300 is rotatably arranged in the mounting cavity 110 and is axially arranged in the left-right direction. Bristles are provided on the outer peripheral surface of the roller brush 300. The bristles located on the bottom side of the roller brush 300 contact the surface to be cleaned and clean the surface to be cleaned when the roller brush 300 rotates.

[0046] Combination Figure 2 The dust suction port 120 is arranged at the rear side of the installation cavity 110, and a dust suction module 600 is also arranged in the body 100. The dust suction module 600 includes a dust box 610 and a fan 620. The inlet of the dust box 610 is connected with the dust suction port 120, and the outlet of the dust box 610 is connected with the fan 620. When the fan 620 is working, it provides suction to form a dust suction airflow flowing from the dust suction port 120 into the dust box 610. The dirt driven by the roller brush 300 follows the dust suction airflow and flows from the dust suction port 120 into the dust box 610 to achieve the purpose of dust suction.

[0047] Combination Figure 4 In this embodiment, the roller brush 300 is tapered, and the outer diameter of the roller brush 300 gradually decreases from the driving end 310 to the following end 320. The difference in outer diameters at both ends of the roller brush 300 is used to provide a certain width variation space for the gap 400, so that the width of the gap 400 can maintain a nonlinear increasing trend from the driving end 310 to the following end 320. The overall rotation speed of the roller brush 300 is consistent, and the linear velocity of the roller brush 300 at the driving end 310 is greater than the linear velocity at the following end 320. The dirt driven by the roller brush 300 is easy to move from the driving end 310 with a larger linear velocity to the following end 320 with a smaller linear velocity, which is conducive to ensuring the dust collection effect.

[0048] Combination Figure 5In order to ensure the cleaning effect of the roller brush 300 on the surface to be cleaned, the roller brush 300 is rotatably arranged in the installation cavity 110 with an axial tilt, so that the bottom side of the roller brush 300 is basically parallel to the surface to be cleaned. In this embodiment, both ends of the roller brush 300 are provided with shaft sections 330 protruding outward. Since the roller brush 300 is axially tilted in the installation cavity 110, the shaft section 330 of the driving end 310 is slightly higher than the shaft section 330 of the follower end 320. The shaft section 330 of the driving end 310 is transmission-connected with the power output member of the driving device 200, and the shaft section 330 of the follower end 320 is rotatably mounted in the body 100 or rotatably mounted on the side wall of the installation cavity 110 through a bearing. The driving device 200 can adopt a structure in which a motor and a reduction gearbox are combined. The rotating shaft of the motor is connected to the input shaft of the reduction gearbox, and the shaft section 330 of the driving end 310 is connected to the output shaft of the reduction gearbox. The motor drives the roller brush 300 to rotate with its own central axis as the rotation center line through the reduction gearbox. The bottom side of the roller brush 300 is always parallel to the surface to be cleaned and cleans the surface to be cleaned.

[0049] In order to smoothly form the gap 400 with nonlinear width change, in this embodiment, the guide section 111 and the dust removal section 112 of the installation cavity 110 are both in the shape of a conical cavity, the inner diameter of the guide section 111 gradually decreases from the driving end 310 to the dust suction port 120, the inner diameter of the dust removal section 112 gradually increases from the dust suction port 120 to the follower end 320, and the dust suction port 120 is arranged on the rear side cavity wall of the dust removal section 112. The gap 400 includes a first section 410 arranged between the outer circumference of the roller brush 300 and the inner cavity wall of the guide section 111 and a second section 420 arranged between the outer circumference of the roller brush 300 and the inner cavity wall of the dust removal section 112, the width of the first section 410 gradually increases from the driving end 310 to the dust suction port 120, and the width of the second section 420 gradually increases from the dust suction port 120 to the follower end 320. The inner diameter of the mounting cavity 110 decreases first and then increases nonlinearly from the driving end 310 to the following end 320 . The gap 400 with nonlinearly increasing width is formed by combining the change in the inner diameter of the mounting cavity 110 with the change in the outer diameter of the roller brush 300 . Figure 2 The straight line K1 in the figure indicates the position of the left end point of the installation cavity 110, the straight line K2 indicates the dividing line between the guide section 111 and the dust removal section 112, and the straight line K3 indicates the position of the right end point of the installation cavity 110. The portion of the installation cavity 110 between the straight line K1 and the straight line K3 is the guide section 111, and the portion between the straight line K2 and the straight line K3 is the dust removal section 112. The inner diameter of the guide section 111 gradually decreases from the straight line K1 to the straight line K2, and the inner diameter of the dust removal section 112 gradually increases from the straight line K2 to the straight line K3.

[0050] Combination Figure 5In this embodiment, the taper of the roller brush 300 is greater than the taper of the guide section 111, so that the width of the first section 410 gradually increases from the driving end 310 to the dust suction port 120. The width of the gap 400 at the driving end 310 is W1, the width of the gap 400 at the straight line K2 is W2, and the width of the gap 400 at the straight line K3 is W3. The distance between the straight line K1 and the straight line K2 is the length L1 of the guide section 111, and the distance between the straight line K2 and the straight line K3 is the length L2 of the dust removal section 112. The width change rate RC1 of the guide section 111 is calculated as (W2-W1) / L1, and the width change rate RC2 of the dust removal section 112 is calculated as (W3-W2) / L2. In this embodiment, the width change rate RC1 of the first section 410 is approximately 0.067, and the width change rate RC2 of the second section 420 is approximately 0.245. As an alternative to the present embodiment, the width change rate RC1 of the first section 410 may also be set to other reasonable sizes such as 0.06, 0.065, 0.07, 0.075, 0.08, 0.085, 0.09, 0.095, 0.1, etc., and the width change rate RC2 of the second section 420 may also be set to other reasonable sizes such as 0.2, 0.21, 0.22, 0.23, 0.24, 0.25, 0.26, 0.27, 0.28, 0.29, 0.3, etc.

[0051] In this embodiment, the length L1 of the guide section 111 is greater than the length L2 of the dust removal section 112, and the dust suction port 120 is offset relative to the installation cavity 110. The length of the dust suction port 120 can be consistent with the length L2 of the dust removal section 112, or it can be slightly smaller than the length of the dust removal section 112.

[0052] The length ratio of the guide section 111 to the dust removal section 112 should not be too large or too small, otherwise, the suction force of the dust suction airflow at the two axial ends of the roller brush 300 is weak. The length ratio L1:L2 of the guide section 111 to the dust removal section 112 is 6:1 to 2:1. Specifically, L1:L2 is about 3:1. As an alternative to this embodiment, L1:L2 can also be set to other reasonable sizes such as 6:1, 5:1, 4:1, 3.5:1, 2.5:1, 2:1, etc.

[0053] Combination Figure 4In order to improve the dirt collection effect, a scraping body 340 is provided on the outer peripheral surface of the roller brush 300. The scraping body 340 extends spirally from the driving end 310 to the following end 320 along the rotation direction of the roller brush 300. In this embodiment, the scraping body 340 includes a scraping rubber strip 341 and a scraping hair bundle 342 that are closely arranged. The scraping rubber strip 341 is in a continuously extending spiral shape, and the scraping hair bundle 342 is provided with multiple clusters. The multiple clusters of scraping hair bundles 342 are in an interval-distributed spiral shape. When the roller brush 300 rotates, the scraping body 340 has a guiding effect on the dirt. Under the guidance of the scraping body 340, the dirt can move from the driving end 310 to the following end 320. The dirt moving to the following end 320 can be sucked away through the dust suction port 120. As an alternative to this embodiment, the scraping body 340 can also be provided with only the scraping rubber strip 341 or only the scraping hair bundle 342.

[0054] In order to improve the guiding effect of the scraping body 340 on dirt, the pitch of the scraping body 340 gradually increases from the driving end 310 to the following end 320, that is, the scraping body 340 preferably adopts a non-equal pitch structure, the inclination of the scraping body 340 relative to the axial direction of the roller brush 300 gradually slows down from the driving end 310 to the following end 320, and the axial component force Fx of the scraping body 340 on dirt gradually decreases from the driving end 310 to the following end 320. The axial component force of the scraping body 340 on dirt can be used to strengthen the suction force of the dust suction airflow on the dirt at the driving end 310, so that the dirt at the driving end 310 can move smoothly toward the dust suction port 120 under the combined action of the dust suction airflow and the scraping body 340. As an alternative to this embodiment, the scraping body 340 can also adopt an equal pitch structure on the premise that the scraping body 340 satisfies the requirement of guiding the dirt to move toward the dust suction port 120.

[0055] Combination Figure 3 In this embodiment, the body 100 has a central axis plane P centered on the left and right, two running wheels 520 are provided and are symmetrically distributed about the central axis plane P, the axes of the two running wheels 520 are perpendicular to the central axis plane P, the installation cavity 110 is roughly located between the two running wheels 520 in the left and right direction, and the roller brush 300 arranged in the installation cavity 110 is also located between the two running wheels 520 in the left and right direction.

[0056] In order to improve the walking smoothness of the cleaning device, when the cleaning device is working, the rotation direction of the roller brush 300 is preferably consistent with the rotation direction of the running wheel 520. The rotating roller brush 300 is in contact with the surface to be cleaned and is subjected to the friction force F1 when cleaning the surface to be cleaned. The rotating running wheel 520 makes the cleaning device contact with the surface to be cleaned and is subjected to the friction force F2 when moving. The rotation direction of the roller brush 300 is set to be consistent with the rotation direction of the running wheel 520, so that the directions of the two friction forces are consistent, and the friction force F1 of the roller brush 300 is used to assist the running wheel 520 in driving the cleaning device to move.

[0057] When the cleaning device is working, the traveling wheel 520 rotates to drive the cleaning device as a whole to move forward, the fan 620 works to provide suction to form a dust suction airflow flowing through the dust box 610, and the roller brush 300 rotates to clean the surface to be cleaned. The dirt at the driving end 310 moves from the driving end 310 to the following end 320 under the guidance of the scraping body 340. When the dirt moves to the dust removal section 112, due to the large width of the gap 400 between the outer peripheral surface of the roller brush 300 and the inner wall of the dust removal section 112, the dirt can easily detach from the roller brush 300 under the suction force of the dust suction airflow and be sucked into the dust box 610 through the dust suction port 120.

[0058] The other structures of the cleaning robot refer to the prior art, such as two side brush assemblies symmetrically distributed on the front of the body 100, a battery and a control panel are arranged inside the body 100, etc., which will not be repeated here.

[0059] Of course, the cleaning device of this embodiment is not limited to the cleaning robot described above or shown in the drawings, but also includes handheld cleaning machines such as handheld floor scrubbers, handheld floor wipers, and handheld vacuum cleaners with handles and manually operated by users.

[0060] Embodiment 2

[0061] Combination Figure 6 , Figure 7 In this embodiment, the roller brush 300 includes a first part 300a corresponding to the guide section and a second part 300b corresponding to the dust removal section. The taper of the second part 300b is greater than that of the first part 300a. The outer diameter of the roller brush 300 adopts a nonlinear decreasing trend. The outer diameter of the roller brush 300 in the second part 300b is further reduced, and the width of the second section 420 located between the outer peripheral surface of the second part 300b and the wall of the dust removal section cavity is further increased, so that the dirt moving from the driving end 310 to the following end 320 can be more easily separated from the roller brush 300 and sucked away through the dust suction port 120, which is beneficial to improving the dust suction effect. Figure 6 The straight line J1 in the figure indicates the starting point of the first part 300a, the straight line J2 indicates the boundary between the first part 300a and the second part 300b, and the straight line J3 indicates the end point of the second part 300b. The second part 300b may be completely located in the dust removal section of the installation cavity, or may be at least partially located in the dust removal section of the installation cavity.

[0062] In this embodiment, the cross-sectional shape of the first portion 300a along the direction perpendicular to the axial direction is circular, and the cross-sectional shape of the second portion 300b along the direction perpendicular to the axial direction can be a reasonable shape such as a circle, an ellipse, or a regular polygon.

[0063] The other structures of the second embodiment are the same as those of the first embodiment and will not be described in detail here.

[0064] Embodiment 3

[0065] Combination Figure 8 In this embodiment, based on the combination of the first part 300a and the second part 300b with different tapers of the roller brush 300, the inner diameters of the guide section and the dust removal section of the installation cavity are set to be consistent, that is, the installation cavity 110 adopts an equal diameter structure, and only the taper change of the two parts of the roller brush 300 is used to form the first section 410 and the second section 420 with different width change rates.

[0066] The other structures of the third embodiment are the same as those of the second embodiment and will not be described in detail here.

[0067] Embodiment 4

[0068] Combination Fig. 9 In this embodiment, a cutting piece 700 for cutting hair is provided in the installation cavity 110 corresponding to the follower end 320. If the hair moving from the driving end 310 to the follower end 320 following the dust suction airflow is not sucked away through the dust suction port 120, it is easy to be entangled in the follower end 320. The cutting piece 700 can be fixedly arranged, and the follower end 320 rotating relative to the cutting piece 700 allows the hair to be cut by the fixed cutting piece 700. The hair cut by the cutting piece 700 is not easy to be entangled in the follower end 320, so that the cut hair can be sucked away through the dust suction port 120 under the action of the dust suction airflow.

[0069] As an optional solution of this embodiment, the cutting member 700 can be a blade, cutting teeth with cutting edges, or other components that meet the hair cutting requirements.

[0070] In this embodiment, the roller brush 300 may adopt the structure with a uniform taper in the first embodiment, or may adopt the structure with a variable taper in the second embodiment or the third embodiment.

[0071] The other structures of the fourth embodiment are the same as those of the first embodiment and will not be described in detail here.

[0072] In addition to the above preferred embodiments, the present invention has other implementation modes. Those skilled in the art can make various changes and modifications based on the present invention. As long as they do not deviate from the spirit of the present invention, they should all fall within the scope defined in the claims of the present invention.

Claims

1. A cleaning device, comprising a body provided with a mounting cavity, a driving device and a dust suction port, wherein a roller brush driven by the driving device is provided in the mounting cavity, the roller brush comprises a driving end connected to a motor and a follower end away from the motor, the dust suction port is provided on the cavity wall of the mounting cavity, characterized in that: A gap is provided between the outer peripheral surface of the roller brush and the cavity wall of the mounting cavity for dirt to flow, the mounting cavity comprises a guide section extending from the driving end to a position close to the dust suction port and a dust removal section extending from the end of the guide section to the following end, the dust suction port is arranged corresponding to the dust removal section, the width of the gap corresponding to the guide section and the dust removal section increases from one side of the driving end to the side of the following end, and the width change rate of the gap corresponding to the dust removal section is greater than the width change rate of the gap corresponding to the guide section.

2. A cleaning device according to claim 1, characterized in that: The roller brush is tapered and its outer diameter decreases from the driving end to the following end.

3. A cleaning device according to claim 2, characterized in that: The roller brush comprises a first part corresponding to the flow guide section and a second part corresponding to the dust removal section, and the taper of the second part is greater than the taper of the first part.

4. A cleaning device according to claim 2, characterized in that: The guide section and dust removal section of the installation cavity are both in the shape of a conical cavity, the inner diameter of the guide section gradually decreases from the driving end to the dust suction port, and the inner diameter of the dust removal section gradually increases from the dust suction port to the following end.

5. A cleaning device according to claim 2, characterized in that: The inner diameters of the installation cavity in the flow guide section and the dust removal section are consistent.

6. A cleaning device according to claim 1, characterized in that: A scraping body is provided on the outer peripheral surface of the roller brush and extends spirally from the driving end to the following end along the rotating direction of the roller brush.

7. A cleaning device according to claim 6, characterized in that: The pitch of the scraping body gradually increases from the driving end to the following end.

8. A cleaning device according to claim 1, characterized in that: A cutting piece for cutting hair is arranged in the installation cavity corresponding to the follower end.

9. A cleaning device according to claim 1, characterized in that: The length ratio of the flow guide section to the dust removal section is 6:1 to 2:

1.

10. A cleaning device according to claim 1, characterized in that: The machine body is provided with two running wheels which are spaced apart from each other on the left and right sides, and the rotation direction of the roller brush is consistent with the rotation direction of the running wheels.

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